Double window construction



' June" 15, 1937.

R. A. MILLER DOUBLE WINDOW CONSTRUCTION Filed Oct. 5, 1935 INVENTOR.

7' TTORNEYS.

Patented June 15, 1937 UNITED STATES PATENT OFFICE I 2,084,103 DOUBLE wntnow CONSTRUCTION Application October 5, 1935, Serial No. 43,726

2 Claims.

The invention relates to double glazed windows and particularly to the frame construction of the unit which protects-the margins of the pairs of sheets and holds the sheets in assembled relation 5 with suitable compression upon the spacers at the edges of the sheets which provide the seal for the space between the sheets. One object of the invention is the provision of a frame which may:

channel frame together so that no additional fastening means, such as screws or wedges are re- 20' quired for holding the parts in assembled relation. the labor cost in assembling and disassembling as compared with units which lack this feature. One embodiment of the invention is shown in the accompanying drawing, wherein:

a Figure 1 is a front elevation of the complete uni t. And Fig. 2 is an enlarged section on the line IIII of Fig. l. I

Referring to the drawing, l and 2 are glass sheets of the same'sizei and 3is a spacer of yielding material, preferably rubber, which is placed under compression by the frame and acts as a seal. The frame, which is made in four sections,

' one for each side of the unit, is of channel form 35 gles 4 and 5, having the flanges 6 and l in opposition to the outer faces of the glass sheets, sealing material in the form of the strips 8 being interposed between the flanges and the faces of the sheets. The angles are formed of thin sheet metal,'such as steel which are readily bent to the desired configurations.

The base ofthe angle 4 is 'made up of three parallel folds or strips 9, l and II with the folds l0 and II spaced apart to provide a receiving slot for the base of the angle 5. The base l2 of the angle flts snugly into the slot between the folds l0 and II and is provided at its juncture with the flange I with a shoulder l 3. This shoulder l3 interlocks with a shoulder l4 formed at the end of the base of the angle 4, as shown in Fig. 2. The interlock at this point occurs with a snap action due to the spring in the metal, so that after the parts are assembled, they are se- 55 curely, but releasably, held in interlocking relation. This permits of the ready disassembling of the unit, should this be required, in case one of the glass sheets is broken. The parts of the frame, as above described, are so proportioned 50 that when the angles 4 and 5 are snapped into This feature reduces the material cost and' and is made up of a pair of oppositely facing anassembled relation, the spacer 3 and the strips B, 8 are placed under compression, thus insur-' ing a good seal. The frame, as thus constructed, has relatively yielding spring flanges, and at the same time has a relatively stiif, rigid base portion. This is of advantage when the unit is clamped in a car frame in which considerable pressure is applied on the edge of the unit, such pressure tending to bend or buckle the base of the channel frame and to spring the flanges outward. With the present construction, this difliculty is overcome. Other advantages incident to the construction will be readily apparent to those skilled in the art.

It will be understood that the frame construction. on each side of the unit is similar and that the frame members come together along the lines l5, as shown in Fig. 1, where they are either soldered or secured together by any suitable holding means.

What I claim is:

1. In combination ina double window construction, a unit comprising a pair of glass sheets with a yielding spacer between the margins thereof, and a frame made up of channels each comprising a pair of angles of sheet metal construction having their flanges in opposition to the outer faces of the glass sheets and their basesoverlapping and provided with projecting portions which snap into interlocking relation and hold the angles in assembled relation when the frame is applied to the glass sheets and the spacer is placed under compression, one of said bases consisting of three parallel folds of metal with a slot between two of such folds, and the other of said bases consisting of a strip which fits snugly into said slot throughout its length so that the base of the unit is made up of four layers of metal, each of which contacts with the layer next adjacent thereto.

2. In combination in a double window constructionfa unit comprising a pair of glass sheets with a yielding spacer between the margins thereof, and a frame made up of channels each comprising a pair of angles of sheet metal construction having their flanges in opposition to the outer faces of the glass sheets and their bases overlapping and provided with ashoulder and recess interlock which snap into locking engagement when the angles are applied to the glass sheets in -interfitting relation and the spacer is placed under compression, one of said bases consisting of three layers of metal folded one upon the other in parallelism with a slot between the two inner layers, and the other of said bases consisting of a strip which fits snugly in said slot throughout its length so that the base of the unit is made up of four layers of metal, each of which contacts with the layer next adjacent thereto.

ROBERT A. MILLER. 

